The west London giants currently have Kepa Arrizabalaga as their first-choice keeper, but manager Mauricio Pochettino is not fully convinced over him.

The Blues have now made the decision to sign a competitor in Sanchez, who was Brighton 's first-choice goalkeeper for two-and-a-half years.

Sanchez lost his place to Jason Steele during the back end of last season. He became the third-choice after Bart Verbruggen's arrival this summer.

He was always expected to head for the exit door. Chelsea have made the surprise decision to sign him for an initial £20m plus £5m in add-ons.

The Spain international has already agreed personal terms with the Blues, and a transfer could be finalised in the space of the next 48 hours.

The Blues are also in contact with Brighton to land Moises Caicedo , but there has been no progress due to the difference in valuations.

Brighton are quite clear that they won't sell him for less than £100m while the Blues are reluctant to pay more than £80m for the midfielder.

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